Thsourcregion in thpressurflow explanation of phloetransport is most often the
A) root.
B) flower.
C) stem.
D) leaf.
E) soil.
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Q60: Plants in general requirhow many essential elements,
Q61: Thsink region in thpressurflow explanation of phloetransport
Q62: Water moves through a plant becausof
A)transpirational pull.
B)the
Q63: Mycorrhizaare
A)roots.
B)bacteria.
C)fungus roots.
D)isolated plants.
E)small animals found in agricultural
Q64: Thopenings in leaves that function to exchanggases
Q66: Thwaxy covering of thleaf is
A)the cuticle.
B)the epidermis.
C)the
Q67: Movement of solublorganic material through plants is
Q68: Most of thwater moving into a leaf
Q69: Thmost commonly acceptetheory useto explain movement of
Q70: Guarcells
A)surround the stoma.
B)control the opening to the
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